Battery pack integrated with cooling system

Abstract

The utility model relates to the technical field of battery packs, and discloses a battery pack integrated with a cooling system, which comprises a shell provided with an accommodating cavity, at least one battery module is arranged in the accommodating cavity, and a filling space is formed between the battery module and the inner wall of the shell; the cooling system comprises a cooling medium and a metal heat dissipation pipe, the cooling medium comprises a first cooling medium arranged in the filling space and a second cooling medium arranged in the metal heat dissipation pipe, the metal heat dissipation pipe is arranged in the containing cavity and communicated with the outside, at least part of the metal heat dissipation pipe is located in the first cooling medium, and the second cooling medium is located in the second cooling medium. The first cooling medium can cool the battery module, and the second cooling medium can exchange heat with the first cooling medium through the metal radiating pipe. The LED lamp has the advantages of being high in heat dissipation efficiency and even in heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a battery pack with an integrated cooling system. Background Technology

[0002] During charging and discharging, batteries release a significant amount of heat due to chemical reactions, causing the battery temperature to rise and potentially leading to safety incidents. Therefore, battery packs typically require dedicated cooling systems. Traditional cooling solutions primarily employ air cooling or liquid cooling for thermal management. Air cooling systems rely on air convection for heat dissipation, but due to air's low thermal conductivity, their heat dissipation efficiency is significantly limited. Liquid cooling systems utilize liquid cooling plates at the bottom of the battery, allowing coolant to circulate and exchange heat within the plates. While their heat dissipation efficiency is superior to air cooling, the limited contact area still restricts their effectiveness, and achieving uniform heat dissipation across the entire battery pack is difficult. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a battery pack with an integrated cooling system that has high heat dissipation efficiency and uniformity.

[0004] The technical solution adopted by this utility model to solve its technical problem is a battery pack with an integrated cooling system, comprising:

[0005] The housing has a receiving cavity in which at least one battery module is disposed, and a filling space is formed between the battery module and the inner wall of the housing.

[0006] A cooling system comprising a cooling medium and a metal heat sink, the cooling medium comprising a first cooling medium disposed within the filling space and a second cooling medium disposed within the metal heat sink, the metal heat sink being disposed within the accommodating cavity and communicating with the outside, the metal heat sink being at least partially located within the first cooling medium, wherein the first cooling medium cools the battery module, and the second cooling medium exchanges heat with the first cooling medium through the metal heat sink.

[0007] Furthermore, the outer casing is provided with a first sealing joint and a second sealing joint that communicate with the outside. The metal heat sink includes an input pipe that connects to the first sealing joint and an output pipe that connects to the second sealing joint. The second cooling medium can enter the metal heat sink through the first sealing joint and can flow out of the metal heat sink through the second sealing joint.

[0008] Furthermore, the metal heat sink includes at least two sets of shunt pipes, both sets of shunt pipes are immersed in the first cooling medium and are located on both sides of the battery module, and one end of each set of shunt pipes is connected to the input pipe and the other end is connected to the output pipe.

[0009] Furthermore, the battery module is provided with multiple sets, and the metal heat dissipation pipe includes multiple sets of shunt pipes. All sets of shunt pipes are immersed in the first cooling medium and are arranged one by one or at intervals between two adjacent sets of battery modules. Each set of shunt pipes is connected to the input pipe at one end and to the output pipe at the other end.

[0010] Furthermore, the cooling system also includes a distributor located between the input pipe and the branch pipe, with one end of the distributor connected to the input pipe and the other end connected to the end of the branch pipe away from the output pipe, and the distributor can control the flow rate of each branch pipe.

[0011] Furthermore, the shunt includes a surrounding section located on the side of the battery module, the surrounding section being adapted to the length of the sidewall of the battery module, and the surrounding section including multiple branch pipes arranged at intervals along the height direction of the battery module, the multiple branch pipes being connected end to end in sequence.

[0012] Furthermore, it includes a fixing component comprising a plurality of first fixing structures, each group of the surrounding segments being configured with at least one of the first fixing structures, wherein one side of the first fixing structure is detachably fixed within the housing, and the other side is attached to the surrounding segment to form a detachable connection.

[0013] Furthermore, it includes a fixing component comprising a plurality of second fixing structures, each group of the circumferential segment being configured with a plurality of the second fixing structures, wherein the plurality of the second fixing structures are arranged along the length direction of the circumferential segment and are detachably attached to the circumferential segment, and the second fixing structures enable the gap between two adjacent branch pipes to remain unchanged.

[0014] Furthermore, the housing includes a detachably connected housing and a housing cover, the accommodating cavity is disposed within the housing, and the inner wall of the housing is detachably provided with a support structure. The battery module is detachably connected to the support structure and forms a filling space between the battery module and the inner wall of the housing for the first cooling medium to be filled.

[0015] Furthermore, the metal heat sink includes one or more of copper, aluminum, and gold tubes.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] 1. In this utility model, the cooling system includes a cooling medium and a metal heat sink. The cooling medium includes a first cooling medium disposed within the filling space and a second cooling medium disposed within the metal heat sink. The metal heat sink is disposed within the accommodating cavity and communicates with the outside, and at least partially located within the first cooling medium. The first cooling medium cools the battery module, and the second cooling medium exchanges heat with the first cooling medium through the metal heat sink. This design achieves synergistic cooling of the two media through the static filling of the first cooling medium and the dynamic circulation of the second cooling medium. The first cooling medium increases the contact area with the surface of the battery module, enabling it to quickly absorb heat and evenly diffuse it throughout the entire medium layer. The second cooling medium carries away heat through flow, preventing heat accumulation in the first cooling medium. This improves heat dissipation efficiency while maintaining a stable battery operating temperature, thereby extending battery life and improving performance.

[0018] 2. In this utility model, the outer shell is provided with a first sealing joint and a second sealing joint that communicate with the outside. The metal heat dissipation pipe includes an input pipe that connects to the first sealing joint and an output pipe that connects to the second sealing joint. The second cooling medium can enter the metal heat dissipation pipe through the first sealing joint and can flow out of the metal heat dissipation pipe through the second sealing joint. This design not only ensures that the second cooling medium can circulate, but also effectively prevents leakage of the cooling medium at the connection between the first and second sealing joints and the outer shell, significantly improving the reliability of the system.

[0019] 3. In this invention, the metal heat sink includes at least two branch pipes, which are immersed in the first cooling medium and located on both sides of the battery module. Each branch pipe has one end connected to the input pipe and the other end connected to the output pipe. This design allows heat to be carried away more evenly, improving overall heat dissipation efficiency and reducing the possibility of hot spots. Furthermore, the redundancy design ensures that the remaining branch pipes can maintain their heat dissipation function even if one branch pipe fails, thus guaranteeing the overall reliability of the cooling system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the battery pack structure of this utility model.

[0021] Figure 2 This is an exploded view of the battery pack of this utility model.

[0022] Figure 3 This is a cross-sectional view of the battery pack of this utility model.

[0023] Figure 4 This is a schematic diagram of the structure of the metal heat sink in this utility model.

[0024] Figure 5 for Figure 4 A structural diagram from another perspective.

[0025] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 100, outer casing; 110, housing; 120, cover; 130, support structure; 131, first groove; 132, second groove; 140, filling space; 150, sealing gasket; 200, battery module; 300, metal heat sink; 310, input pipe; 320, output pipe; 330, shunt pipe; 331, surrounding section; 332, branch pipe; 400, first sealing joint; 500, second sealing joint; 600, shunt; 700, first fixing structure; 710, connecting part; 800, second fixing structure; 810, support plate; 820, locking part. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] like Figures 1 to 5 As shown, in this embodiment, a battery pack with an integrated cooling system includes:

[0032] The outer casing 100 has a receiving cavity in which at least one set of battery modules 200 are disposed, and a filling space 140 is formed between the battery modules 200 and the inner wall of the outer casing 100.

[0033] The cooling system includes a cooling medium and a metal heat sink 300. The cooling medium includes a first cooling medium disposed within a filling space 140 and a second cooling medium disposed within the metal heat sink 300. The metal heat sink 300 is located within a receiving cavity and communicates with the outside, and at least partially is located within the first cooling medium. The first cooling medium cools the battery module 200, and the second cooling medium exchanges heat with the first cooling medium through the metal heat sink 300. This design achieves synergistic cooling through the static filling of the first cooling medium and the dynamic circulation of the second cooling medium. The first cooling medium increases the contact area with the surface of the battery module 200, enabling it to quickly absorb heat and evenly diffuse it throughout the entire medium layer. The second cooling medium carries away heat through flow, preventing heat accumulation in the first cooling medium. This improves heat dissipation efficiency while maintaining a stable battery operating temperature, thereby extending battery life and improving performance.

[0034] Specifically, such as Figures 1 to 5 As shown, in this embodiment, the outer casing 100 is rectangular and includes a detachably connected housing 110 and a cover 120. The housing 110 has a rectangular accommodating cavity communicating with the outside for housing components such as the battery module 200 and cooling system. The cover 120 is detachably fitted onto the housing 110 and can close the accommodating cavity. This design not only ensures the convenience of battery pack disassembly, assembly, and maintenance but also prevents external dust from entering the battery pack, improving the safety of battery pack use.

[0035] In this embodiment, the cover 120 and the housing 110 are detachably connected by fasteners or snap-fit ​​structures. Preferably, both the cover 120 and the housing 110 have corresponding mounting holes, and the two are detachably connected by fasteners. This design ensures the reliability of the connection between the two while reducing production and maintenance costs.

[0036] In this embodiment, a sealing gasket 150 is also provided between the cover 120 and the housing 110. The sealing gasket 150 is arranged circumferentially along the housing 110. When the cover 120 is fixed on the housing 110, it can compress the sealing gasket 150, so that the two form a seamless connection. This design creates a waterproof sealed space inside the battery pack, effectively improving the waterproof performance and overall reliability of the battery pack.

[0037] To ensure that the first cooling medium fully encloses the battery module 200, in this embodiment, a support structure 130 is detachably provided on the inner wall of the housing 110. This support structure secures the battery module 200 within the housing 110 and creates filling spaces 140 between multiple surfaces of the battery module 200 and the inner wall of the housing 110 for the first cooling medium to fill. This design allows the first cooling medium to fully contact all surfaces of the battery module 200, achieving more efficient heat exchange and dissipation.

[0038] In this embodiment, the support structure 130 is a rectangular support plate 810 detachably mounted on the bottom wall of the housing 110, or an L-shaped support frame detachably mounted on the side wall of the housing 110. Preferably, the support structure 130 is a rectangular support plate 810 detachably mounted on the bottom wall of the housing 110, and there is a gap between the support structure 130 and the bottom wall of the housing 110 for filling with the first cooling medium. This design increases the contact area between the support structure 130 and the battery module 200, ensuring the stability of the battery module 200.

[0039] In this embodiment, the support structure 130 has a first groove 131 recessed towards the bottom wall of the housing 110. The size of the first groove 131 is adapted to the size of the battery module 200 and has a gap with the bottom wall of the housing 110. The support structure 130 also has multiple second grooves 132 recessed towards the bottom wall of the housing 110 along the first groove 131. These second grooves 132 are equidistantly arranged along the length of the first groove 131 and fit against the bottom wall of the housing 110, with a gap between the second grooves 132 and the outer wall of the battery module 200. This design not only increases the rigidity and stability of the support structure 130, enabling the battery module 200 to maintain a stable position during use and reducing the risk of displacement due to vibration or other external factors, but also ensures that the first cooling medium can directly or indirectly contact the bottom of the battery module 200, achieving efficient heat transfer.

[0040] In this embodiment, the housing 110 of the outer casing 100 is further provided with a first sealing joint 400 and a second sealing joint 500 communicating with the outside. The first sealing joint 400 is used for the input of the second cooling medium, and the second sealing joint 500 is used for the output of the second cooling medium. This design not only ensures that the second cooling medium can circulate, but also effectively prevents leakage of the cooling medium at the connection between the first and second sealing joints 500 and the outer casing 100, significantly improving the reliability of the system.

[0041] In this embodiment, "penetration" means that one end of the first sealing joint 400 and the second sealing joint 500 passes through the side wall of the housing 110 and is exposed to the outside, while the other end passes through the side wall of the housing 110 and is located in the accommodating cavity.

[0042] Preferably, in this embodiment, both the first sealing joint 400 and the second sealing joint 500 are through-wall terminals, and they are fixed to the front panel of the housing 110 by a die-casting process. This design further enhances the bonding strength between the sealing joint and the housing 110, avoiding the risk of loosening or leakage due to long-term use or vibration.

[0043] In this embodiment, the battery pack includes one or more battery modules 200. When multiple battery modules 200 are provided, they are arranged sequentially along the width direction of the housing 110, with gaps between adjacent battery modules 200. Each battery module 200 is detachably fixed to the support structure 130 by fasteners, forming a filling space 140 between itself and the inner wall of the housing 110. This design allows for better flow and distribution of the first cooling medium, improving heat transfer efficiency, facilitating more uniform heat dissipation, and reducing the formation of hot spots. Furthermore, the detachable fixing method makes the installation, removal, and replacement of single or multiple battery modules 200 simpler and faster, reducing maintenance costs and time consumption.

[0044] To achieve efficient heat dissipation of the battery module 200, a cooling system is integrated into the battery pack in this embodiment. This cooling system includes a cooling medium and a metal heat sink 300. The cooling medium includes a first cooling medium disposed within the filling space 140 and a second cooling medium disposed within the metal heat sink 300. The first cooling medium fills the filling space 140 and immerses the battery module 200, cooling it by absorbing its heat. The second cooling medium circulates within the metal heat sink 300 and exchanges heat with the first cooling medium through it, carrying away the heat from the first cooling medium. This design ensures uniform heat absorption of the battery module 200 through the static filling characteristics of the first cooling medium, while the dynamic flow of the second cooling medium effectively prevents localized overheating, resulting in a more uniform temperature distribution within the battery module 200 and reducing the impact of thermal stress on the battery. Compared to a single cooling medium design, this significantly improves heat dissipation efficiency, thereby enhancing the overall performance and safety of the battery pack.

[0045] In this embodiment, the first cooling medium is a highly thermally conductive and insulating medium, such as synthetic oil, fluorinated liquid, silicone oil, or ultrapure water. These media have excellent thermal conductivity and electrical insulation properties, effectively absorbing and dispersing the heat generated by the battery module 200. The second cooling medium uses a phase change refrigerant, such as R134A, R410A, R32, or R1234yf. These refrigerants utilize the phase change that occurs during their circulation, i.e., when they change from a liquid to a gaseous state, absorbing a large amount of heat and efficiently carrying away the heat from the first cooling medium, preventing heat accumulation. This design not only solves the limitations of traditional single cooling media in terms of heat dissipation efficiency and temperature control, but also significantly improves the overall performance and safety of the battery pack.

[0046] In this embodiment, the metal heat sink 300 includes an input pipe 310 that connects to the first sealing joint 400, and an output pipe 320 that connects to the second sealing joint 500. The input pipe 310 introduces the second cooling medium from the outside into the metal heat sink 300, while the output pipe 320 discharges the second cooling medium, after heat exchange, to an external circulation system. This design clearly defines the flow direction of the second cooling medium, ensuring that it can circulate efficiently along a predetermined path.

[0047] In this embodiment, the metal heat sink 300 includes one or more of copper, aluminum, and gold tubes. Preferably, the metal heat sink 300 is a copper tube. This design fully utilizes the high thermal conductivity and good mechanical properties of copper, ensuring not only efficient and reliable thermal management but also reducing production costs.

[0048] In this embodiment, one end of the input pipe 310 is detachably connected to the first sealing joint 400, and the other end is detachably connected to the input end of the separator. The output pipe 320 includes a first pipe and a second pipe connected in a T-shape. One end of the first pipe is detachably connected to the second sealing joint 500, and the other end is perpendicularly connected to the second pipe. The side of the second pipe opposite to the first pipe is perpendicularly connected to multiple branch pipes 330. The diameter of the second pipe is larger than the diameter of the branch pipes 330. This design not only simplifies the assembly process of the cooling system but also reduces the cost and time consumption of subsequent maintenance. In addition, the larger diameter of the second pipe than the diameter of the branch pipes 330 effectively reduces the flow resistance of the fluid in the pipe, ensuring that the cooling medium can be evenly distributed among the branch pipes 330, avoiding a decrease in heat dissipation efficiency due to uneven flow.

[0049] In this embodiment, the metal heat sink 300 includes at least two branch pipes 330, both of which are immersed in the first cooling medium and are located on opposite sides of the battery module 200. One end of each branch pipe 330 is connected to the input pipe 310, and the other end is connected to the output pipe 320. This design allows the second cooling medium to directly remove heat from the first cooling medium through heat exchange. Furthermore, the multiple branch pipes 330 design ensures that the second cooling medium can uniformly remove heat from multiple directions, preventing heat concentration on one side or in one area of ​​the battery module 200, improving overall heat dissipation efficiency, and reducing the possibility of hotspot formation. In addition, the use of at least two branch pipes 330 increases system redundancy, ensuring that the remaining branch pipes 330 can still maintain their heat dissipation function even if one branch pipe 330 fails, thereby guaranteeing the overall reliability of the cooling system.

[0050] Preferably, in this embodiment, the metal heat sink 300 includes multiple flow pipes 330, all of which are immersed in the first cooling medium and are arranged one by one or at intervals between adjacent battery modules 200. Each flow pipe 330 has one end connected to the input pipe 310 and the other end connected to the output pipe 320. The flexible arrangement of the multiple flow pipes 330 allows for adaptation to different battery module arrangements and power density requirements. When the multiple flow pipes 330 are arranged one by one between adjacent battery modules 200, the second cooling medium can fully cover the surrounding area of ​​each battery module 200, thereby achieving a more uniform heat distribution.

[0051] Preferably, in this embodiment, the battery module 200 is provided with four groups and the shunt pipe 330 is provided with five groups. A shunt pipe 330 is provided between two adjacent battery modules 200, and a shunt pipe 330 is provided between each of the two outer battery modules 200 and the outer casing 100.

[0052] In this embodiment, the shunt pipe 330 includes a surrounding section 331 located on the side of the battery module 200. The surrounding section 331 is adapted to the length of the side wall of the battery module 200, and the surrounding section 331 includes multiple branch pipes 332 arranged at intervals along the height direction of the battery module 200. The multiple branch pipes 332 are connected end to end in sequence. This design further expands the contact area between the shunt pipe 330 and the first cooling medium, and fully corresponds to the heat-generating parts of the battery module 200, so that heat can be quickly transferred from the side wall of the battery module 200 to the first cooling medium, and then the heat can be quickly removed through heat exchange with the second cooling medium, further improving the heat dissipation efficiency.

[0053] In this embodiment, the surrounding segment 331 is S-shaped or W-shaped. Its length being adapted to the length of the battery module sidewall means that it is equal to or slightly greater than the length of the battery module sidewall.

[0054] In this embodiment, a fixing component is also included, comprising a plurality of first fixing structures 700. Each group of surrounding segments 331 is equipped with at least one first fixing structure 700, and one side of the first fixing structure 700 is detachably fixed inside the housing 100, while the other side is attached to the surrounding segment 331 to form a detachable connection. This design can firmly fix the shunt pipe 330 inside the housing 100, preventing the shunt pipe 330 from shifting due to vibration, impact, or other external factors. By reducing the gap fluctuation between the shunt pipe 330 and the battery module 200, the uniformity and stability of heat dissipation are further enhanced.

[0055] In this embodiment, the first fixing structure 700 is a sheet metal part, plate-shaped, and has an L-shaped connecting portion 710. This connecting portion 710 is detachably connected to the supporting structure 130 or the inner wall of the housing 110 via fasteners. Preferably, the connecting portion 710 is detachably connected to the supporting structure 130. This design achieves a stable fixation of the surrounding section 331 while providing flexible installation and maintenance convenience.

[0056] In this embodiment, the fixing assembly further includes multiple second fixing structures 800. Each group of surrounding segments 331 is equipped with multiple second fixing structures 800. The multiple second fixing structures 800 are arranged along the length direction of the surrounding segment 331 and are detachably attached to the surrounding segment 331. The second fixing structures 800 can keep the gap between two adjacent branch pipes 332 unchanged. This design not only fixes the gap between the branch pipes 332, but also provides support and reinforcement for the entire surrounding segment 331, effectively improving the mechanical strength of the diversion pipe 330.

[0057] Preferably, in this embodiment, the second fixing structure 800 is a sheet metal part, which includes a support plate 810 and a locking part 820 detachably disposed on the support plate 810. The support plate 810 is rectangular and fits snugly against multiple branch pipes 332. The locking part 820 is U-shaped and can fix the branch pipes 332 to the support plate 810 by fasteners. This design provides a large contact area between the second fixing structure 800 and the diversion pipe 330, enhancing the mechanical strength of the diversion pipe 330 and preventing it from deforming or shifting due to external vibration or impact. The design of the locking part 820 not only increases the reliability of fixing and reduces the relative movement between the branch pipes 332, but also improves the convenience of disassembly, assembly, and maintenance.

[0058] In this embodiment, the cooling system also includes a distributor 600, which is located between the input pipe 310 and the branch pipe 330. One end of the distributor 600 is connected to the input pipe 310, and the other end is connected to the end of the branch pipe 330 away from the output pipe 320. The distributor 600 can control the flow rate of each branch pipe 330. This design achieves precise control of the flow rate and pressure of the second cooling medium, which not only improves the heat dissipation efficiency and uniformity but also enhances the flexibility and reliability of the system.

[0059] Preferably, in this embodiment, the shunt 600 is a standard component, vertically arranged, and has an input port and multiple output ports. The input port is detachably connected to the input tube 310, and the multiple output ports correspond one-to-one with and are detachably connected to multiple shunt tubes 330. This design fully utilizes the vertical space inside the battery pack, reduces the occupation of horizontal space, and thus optimizes the overall layout.

Claims

1. A battery pack with an integrated cooling system, characterized in that, include: The outer casing (100) has a receiving cavity, and at least one set of battery modules (200) is provided in the receiving cavity. A filling space (140) is formed between the battery modules (200) and the inner wall of the outer casing (100). A cooling system comprising a cooling medium and a metal heat sink (300), the cooling medium comprising a first cooling medium disposed within the filling space (140) and a second cooling medium disposed within the metal heat sink (300), the metal heat sink (300) being disposed within the accommodating cavity and communicating with the outside, the metal heat sink (300) being at least partially located within the first cooling medium, wherein the first cooling medium cools the battery module (200), and the second cooling medium exchanges heat with the first cooling medium through the metal heat sink (300).

2. The battery pack of the integrated cooling system according to claim 1, characterized in that, The outer casing (100) is provided with a first sealing joint (400) and a second sealing joint (500) communicating with the outside. The metal heat sink (300) includes an input pipe (310) that connects to the first sealing joint (400) and an output pipe (320) that connects to the second sealing joint (500). The second cooling medium can enter the metal heat sink (300) through the first sealing joint (400) and can flow out of the metal heat sink (300) through the second sealing joint (500).

3. The battery pack of the integrated cooling system according to claim 2, characterized in that, The metal heat sink (300) includes at least two sets of shunt pipes (330), both sets of shunt pipes (330) are immersed in the first cooling medium and are located on both sides of the battery module (200), and one end of each set of shunt pipes (330) is connected to the input pipe (310) and the other end is connected to the output pipe (320).

4. The battery pack of the integrated cooling system according to claim 2, characterized in that, The battery module (200) is provided with multiple sets, and the metal heat sink (300) includes multiple sets of shunt pipes (330). The multiple sets of shunt pipes (330) are all immersed in the first cooling medium and are arranged one by one or at intervals between two adjacent sets of battery modules (200). One end of each set of shunt pipes (330) is connected to the input pipe (310), and the other end is connected to the output pipe (320).

5. A battery pack with an integrated cooling system according to claim 3 or 4, characterized in that, The cooling system also includes a distributor (600), which is located between the input pipe (310) and the branch pipe (330). One end of the distributor (600) is connected to the input pipe (310), and the other end is connected to the end of the branch pipe (330) away from the output pipe (320). The distributor (600) can control the flow rate of each branch pipe (330).

6. A battery pack with an integrated cooling system according to claim 3 or 4, characterized in that, The shunt pipe (330) includes a surrounding section (331) located on the side of the battery module (200). The surrounding section (331) is adapted to the length of the side wall of the battery module (200), and the surrounding section (331) includes multiple branch pipes (332) arranged at intervals along the height direction of the battery module (200). The multiple branch pipes (332) are connected end to end in sequence.

7. The battery pack of the integrated cooling system according to claim 6, characterized in that, The device includes a fixing assembly comprising a plurality of first fixing structures (700), each group of the surrounding segments (331) being provided with at least one of the first fixing structures (700), and one side of the first fixing structure (700) being detachably fixed inside the housing (100), and the other side being attached to the surrounding segment (331) and forming a detachable connection.

8. The battery pack of the integrated cooling system according to claim 6, characterized in that, The system includes a fixing component comprising a plurality of second fixing structures (800), each of the surrounding segments (331) being provided with a plurality of second fixing structures (800), wherein the plurality of second fixing structures (800) are arranged along the length of the surrounding segment (331) and are detachably attached to the surrounding segment (331), and the second fixing structures (800) are capable of keeping the gap between two adjacent branch pipes (332) unchanged.

9. The battery pack of the integrated cooling system according to claim 1, characterized in that, The outer casing (100) includes a detachably connected housing (110) and a cover (120). The accommodating cavity is located inside the housing (110), and the inner wall of the housing (110) is detachably provided with a support structure (130). The battery module (200) is detachably connected to the support structure (130) and forms a filling space (140) between it and the inner wall of the housing (110) for the first cooling medium to be filled.

10. The battery pack of the integrated cooling system according to claim 1, characterized in that, The metal heat sink (300) includes one or more of copper, aluminum and gold tubes.

Images